Sigurd, I believe that you are not being objective when you say that first it is the battle for Britain.. or for Europe. Two different entities, both wrong in terms of identity. Let us dissect both.
In terms of identity, Britain is not the solution but part of the problem, for the peoples of the Island(s). When you evoke a "British" identity, you are summoning an essence of multiculturalism unique to the Islands, and other peoples outside of Europe.
Scottish is Scottish, Irish is Irish... or even both are Gaelic, Welsh is Welsh, ... even Cornish is Cornish, but let us leave that now... English is English. And it is there where identity lies, therefore where you appeal to people for strength and for resistance.
British... well, Indians are British, Pakistanis are British, Afro-Caribbeans are British, Australians are British, Even Chinese are British, and so forth. It is a fabrication, a constructed pseudo-identity. In the Islands, it is the earliest manifestation of multiculturalism.
Aren't you a Folkish Nationalist? Then you must agree in that grassroots identity is the very essence of our identity, without which nothing else matters.
And so, Europe. It is not true that Europe constitutes an identity. It does serve as a platform where our individual, national identities are compared between themselves and in front of others. And not necessarily in racial terms.
First and foremost a Nationalist is concerned with the ethnopolitical identity, and secondly with the geopolitical sphere where that ethnic identity interacts with other identities.
When I say that I am Europeanist, I am strongly defining Europe in terms of my own ethnopolitical interests, as a geopolitical entity. Any other definition of Europe is by rule suspect of being harmful to my identity, either through loss of sovereignty or through forced homogeneisation.
What makes Europe special as a geopolitical entity, is precisely the rich variety and the diversity of the ethnopolitical identities that conform Europe. Without this, it is a mere continuation of the geographical Eurasian continent.
Back to the issue of Scotland, its identity is Gaelic. Germanic? I think that I can help you to see it more clear:
A bird told me that you had recently the visit of one Spanish nutcase babbling nonesense about God knows what Germanic identity in Spain, on account of the Goths. I'm sorry about that. With the Transition to democracy in Spain, many mental hospitals were closed because the State didn't want to pay for that burden, and then those nazi refugees around here who were bored without a reich of their own... you can imagine the cocktail!
Of course that the Goths are our heritage. Or at least the ones that history knows as the heroic Goths. But our identity remains vastly and largely what it has always been, with or without the Goths.
And so the same for Scotland. If some elements of Germanic origin were assimilated among the Scotts, they were assimilated into an identity that is Scottish Gaelic.